DBX 520 De-Esser

  • Based on the classic dbx 902
  • Frequency Control Range from 800Hz to 8kHz
  • Expanded Scale LED Gain Reduction Metering
  • De-essing Amount Range from 0dB to 20dB

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The DBX 520 de-esser will help you expertly tame the excessive sibilance often found in vocals and other high frequency dense material. Based upon the legendary dbx 902, the dbx 520’s unique features make it possible to achieve an exact amount of de-essing regardless of variations in signal levels. The 520 allows you to create brilliant, crisp vocals without sibilance!

With its modular 500 Series based design, the DBX 520 de-esser examines the differences in dB between the high frequency and full-bandwidth portions of a signal, allowing de-essing of signals which change in level by as much as 60dB. It features a Frequency Control with range from 800Hz to 8kHz, Gain Reduction Metering and a De-essing Amount Range from 0dB to 20dB.

Control vocals, drums, percussive instruments and problematic material/reverb combinations with the dbx 520!

dbx has a long and venerated past with modular processors dating back to our classic 900 Series, which are still mainstays in many professional recording studios. Our new 500 Series modules continue that tradition offering legendary dbx processing with modern design.

Recommended for: Portable, Tour, Studio.


DBX 520 De-Esser Features:

  • Based on the classic dbx 902
  • Frequency Control Range from 800Hz to 8kHz
  • Expanded Scale LED Gain Reduction Metering
  • De-essing Amount Range from 0dB to 20dB
  • In/Out Switch
  • HF Mode Switch


DBX 520 De-Esser Specifications:

Input TypeElectronically balanced/unbalanced, RF filtered
Input Impedance20 k Ω balanced, 10 k Ω unbalanced
Max Input Level+22 dBu
CMRR>40 dB; typically >55 dB at 1 kHz
Output TypeElectronically balanced/unbalanced, RF filtered
Output ImpedanceBalanced 30Ω , unbalanced 15Ω
Max Output Level+22 dBu
Frequency Response20Hz – 20kHz, + 0/-0.5dB; 14 Hz – 120 kHz, +0/-3 dB
Noise<-99 dBu, Unweighted (22 Hz – 22 kHz)
THD+Noise<0.006% typical, No compression, 1 input kHz at 0 dBu
Dynamic Range>114 dB
Crossover PointVariable 800 Hz to 8 kHz
Crossover Filter Type12 dB/octave, phase coherent
De-essing RangeOperates uniformly over input range of -40 dBu to +22 dBu without requiring adjustment
Maximum AttenuationVariable 0 to 20 dB
Attack RateProgram-dependent, 2 ms for 10 dB above threshold, 600 μs for 20 dB above threshold, to achieve 63% gain reduction
Release Rate925 dB/sec
ControlsFrequency, Range
IndicatorsIN/OUT, HF ONLY
MeteringLED Column: 1, 2, 3, 4, 6, 8, 10, 12, 15, 20 dB gain reduction
Power Requirements+/- 16V DC
Power Current Draw76 mA per power rail
Power Draw2.4 watts
Rack System Compatibility500 Series Compatible Power-frame
Rack Space1 Slot
Dimensions (H x W x D)5.25” x 1.5” x 6” (13.34 cm x 3.81 cm x 15.24 cm)
Weight1.3 lbs (0.59 kg)
Shipping Weight1.7 lbs (0.77 kg)

Additional information

Weight1.7 lbs
Dimensions6 × 1.5 × 5.25 in


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